"A major oil pipeline owned by Sunoco Logistics Partners LP leaked thousands of gallons of crude oil into a nature preserve in southwest Ohio late on Monday.

Between 7,000 and 10,000 gallons (26,000-38,000 liters) of sweet crude leaked into the Oak Glen Nature Preserve about a quarter of a mile from the Great Miami River, according to early estimates from the Ohio Environmental Protection Agency.

The leak, which occurred on a line operated by Mid-Valley Pipeline Co, a division of Sunoco, was discovered at 8:20 p.m. EDT on Monday (0020 GMT Tuesday). The company shut the line, which helped reduce the pressure of the leaking oil, an EPA spokeswoman said, but it was unclear if oil was still spewing from the pipe."